ADJH21105

ADJH21105 Application Field and Working Principle

The ADJH21105 is a high power industrial relay, which has a rated current of up to 2 amperes. This type of relay is mainly used as a heavy-duty control relay, as well as in various industrial and electrical transmission applications.

The ADJH21105 relay is a simple and reliable relay device that can be used to switch many different types of power engineering systems. It consists of four linear electrical components - a control coil, a sensitive element, an armature, and contact points.

Control Coil

The control coil is an AC- or DC-energized coil that produces a magnetic field. When a certain type of current is applied to the control coil, its magnetic field draws in the armature. The armature is a slider that moves to make contact with the contact points, thus, initiating an electrical circuit. The amount of current required to pull the armature into contact depends on the current rating of the ADJH21105.

Sensitive Element

The sensitive element is also known as a trip element and is responsible for detecting when the current in an electrical circuit is too high. It consists of a spring-loaded bi-metallic strip that bends when the current is too high. When the strip bends, the armature is drawn in and the contact points close, thus switching off the current in the circuit. This type of current overload protection is essential for protecting circuits from damage due to power surges.

Armature

The armature is a metal slider that is held in place by the magnetic field of the control coil. When a current is applied to the control coil, the magnetic field pulls the armature in, thus bringing it into contact with the contact points. The armature springs back open when the current is turned off.

Contact Points

The contact points are two metal tabs that come into contact with each other when the armature is pulled in by the magnetic field of the control coil. When these contact points are closed, it completes an electrical circuit and allows current to flow.

Applications

The ADJH21105 relay is commonly used in power engineering systems for a variety of purposes. Its primary uses include switching both AC and DC power, controlling the flow of current in a circuit, and protecting circuits from power surges. It can also be used to control motors, lighting systems, and other electrical equipment.

Conclusion

The ADJH21105 relay is a robust, reliable, and easy to use electrical device. It is an ideal choice for a variety of industrial and electrical transmission applications. Its high current rating of up to 2 amperes makes it suitable for use in heavy-duty control systems, such as those in power engineering and electrical protection systems.